Contribution of the temperature of the objects to the problem of thermal imaging focusing

Abstract

When focusing an image, depth of field, aperture and distance from the camera to the object, must be taking into account, both, in visible and in infrared spectrum. Our experiments reveal that in addition, the focusing problem in thermal spectrum is also hardly dependent of the temperature of the object itself (and/or the scene).

Preliminary Experiments on Thermal Emissivity Adjustment for Face Images

“…In the past we have used thermal images for a wide range of applications, including face biometric recognition, providing a new database freely available to the scientific community [1][2][3], hand morphology biometric recognition, including a hand image database distributed for free too [4][5][6], biomedical application for tuberculosis detection using tuberculine test and thermal imaging [7], and facial emotion recognition using thermal imaging in an induced emotion database [8]. We have also performed studies about the focusing of thermal images [9] and the fusion of different images containing objects at different focal distances [10][11].…”